Current detection structure
US-9513317-B2 · Dec 6, 2016 · US
Current sensor
US10060953B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10060953-B2 |
| Application number | US-201715471134-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2017 |
| Priority date | Apr 1, 2016 |
| Publication date | Aug 28, 2018 |
| Grant date | Aug 28, 2018 |
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- Title
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Abstract
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A current sensor includes a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar, and a pair of shield plates that include a magnetic material and are arranged to sandwich the busbar in a thickness direction of the busbar. The busbar includes a through-hole penetrating therethrough and current paths formed on both sides of the through-hole, the magnetic sensing element is arranged at a position overlapping the through-hole in the thickness direction of the busbar. The busbar is arranged in a space between the pair of shield plates such that the center in the thickness direction is located at a position offset from the center of the space in the thickness direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A current sensor, comprising: a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar; and a pair of shield plates that comprise a magnetic material and are arranged to sandwich the busbar in a thickness direction of the busbar, wherein the busbar comprises a through-hole penetrating therethrough and current paths formed on both sides of the through-hole, the magnetic sensing element is arranged at a position overlapping the through-hole in the thickness direction of the busbar, and wherein the busbar is arranged in a space between the pair of shield plates such that the center in the thickness direction is located at a position offset from the center of the space in the thickness direction. 2. The current sensor according to claim 1 , wherein the pair of shield plates comprise a first shield plate and a second shield plate arranged closer to the busbar than the first shield plate, and the magnetic sensing element is arranged at a position offset from the center of the busbar toward the second shield plate in the thickness direction. 3. The current sensor according to claim 1 , wherein the magnetic sensing element comprises a GMR sensor. 4. The current sensor according to claim 3 , wherein the magnetic sensing element is arranged such that the detection axis thereof extends along a width direction of the busbar. 5. The current sensor according to claim 1 , comprising: a plurality of busbars; and a plurality of magnetic sensing elements corresponding to the plurality of busbars, wherein the plurality of busbars are aligned in the same plane, and the pair of shield plates are arranged such that all of the plurality of busbars are sandwiched therebetween.
Assignees
Inventors
Classifications
using multilayer structures, e.g. giant magnetoresistance sensors (thin magnetic films H01F10/00) · CPC title
- G01R15/205Primary
using magneto-resistance devices, e.g. field plates · CPC title
Compensating stray fields {(G01R33/0017 takes precedence)} · CPC title
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Frequently asked questions
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- What does patent US10060953B2 cover?
- A current sensor includes a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar, and a pair of shield plates that include a magnetic material and are arranged to sandwich the busbar in a thickness direction of the busbar. The busbar includes a through-hole penetrating there…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01R15/205. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 28 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).